| Langley Park to Cividale del Friuli | 4,372.97 mi (7,037.62 km) |
| Langley Park to Civita Castellana | 4,460.83 mi (7,179.01 km) |
| Langley Park to Civitanova Marche | 4,483.04 mi (7,214.76 km) |
| Langley Park to Civitavecchia | 4,440.80 mi (7,146.78 km) |
| Langley Park to Civitella in Val di Chiana | 4,391.53 mi (7,067.49 km) |
| Langley Park to Clusone | 4,233.39 mi (6,812.98 km) |
| Langley Park to Coccaglio | 4,244.91 mi (6,831.53 km) |
| Langley Park to Codigoro | 4,360.46 mi (7,017.48 km) |
| Langley Park to Codogno | 4,246.24 mi (6,833.67 km) |
| Langley Park to Codroipo | 4,358.67 mi (7,014.61 km) |
| Langley Park to Cogoleto | 4,225.21 mi (6,799.82 km) |
| Langley Park to Colle di Val d'Elsa | 4,366.65 mi (7,027.45 km) |
| Langley Park to Colle Salvetti | 4,331.48 mi (6,970.85 km) |
| Langley Park to Collecchio | 4,281.68 mi (6,890.69 km) |
| Langley Park to Colleferro | 4,507.52 mi (7,254.15 km) |
